Yttria-stabilized zirconia (YSZ)-based thermal barrier coating (TBC) has been integrated with thermographic phosphors through air plasma spray (APS) for in-depth; non-contact temperature sensing. This coating consisted of a thin layer of Dy-doped YSZ (about 40 µm) on the bottom and a regular YSZ layer with a thickness up to 300 µm on top. A measurement system has been established; which include...

Abstract This study investigates the optimal conditions to deposit a thermal barrier coating using micro- and nanopowders in air plasma spraying (APS) process. The influence of APS process parameters on thickness, porosity hardness yttria-stabilized zirconia (YSZ; ZrO 2 × 8Y O 3 ) coatings deposited with single-electrode gun was determined. temperature velocity melted particles were determined ...

Submitted for the MAR11 Meeting of The American Physical Society Origin of colossal ionic conductivity in YSZ/STO multilayers TIMOTHY PENNYCOOK, MARK OXLEY, Vanderbilt Univ., Oak Ridge National Laboratory, MATTHEW BECK, Vanderbilt Univ., JAVIER GARCIABARRIOCANAL, FLAVIO BRUNO, CARLOS LEON, JACOBO SANTAMARIA, Complutense Univ., Madrid, MARIA VARELA, Oak Ridge National Laboratory, STEPHEN PENNYCO...

The adsorption, dissociation, and diffusion of hydrogen in Ni(100) and Ni(100)/YSZ(100) slabs with two different interfaces (Ni/cation and Ni/O interface) have been studied by the density functional theory (DFT) with the Perdew-Wang functional. The H(2) molecule is found to preferentially absorb on a Top (T) site with side-on configuration on the Ni(100) surface, while the H-atom is strongly bo...

Solid oxide fuel cells (SOFCs) are promising electrochemical energy conversion devices owing to their high power generation efficiency and environmentally benign operation. Micro-tubular SOFCs, which have diameters ranging from a few millimeters to the sub-millimeter scale, offer several advantages over competing SOFCs such as high volumetric power density, good endurance against thermal cyclin...

The formation and removal of the carbonaceous deposits formed by n-butane and liquid hydrocarbons, such as n-decane and proprietary light and heavy naphthas, between 973 and 1073 K on YSZ and ceria-YSZ, has been studied to determine conditions for stable operation of direct-utilization SOFC. First, it is shown that deactivation of SOFC with Cu-ceria-YSZ anodes operating on undiluted n-decane, a...

Yttria stabilized zirconia (YSZ) has been widely used as electrolyte in solid oxide fuel cell (SOFC). The effect of fabrication process on the properties of YSZ electrolyte thick film is discussed in the paper. With YSZ nano-powders of about 20-60nm as raw material, YSZ green adobe was fabricated by tape calendering process. Three-step sintering process was performed firstly holding at 1000°C f...

During the last three decades, a large number of investigations has been reported pertaining to the science and technology of solid oxide fuel cells (SOFCs) based mainly on the yttria-stabilized zirconia (YSZ) electrolyte. Because of the problems associated with the high temperature of operation ( ,-~ 1 000 ~ of the YSZ-based cells, there has been a substantial effort to develop alternative ele...

Novel strategies based on spray-pyrolysis deposition are proposed to increase the triple-phase boundary (TPB) of La0.8Sr0.2MnO3-δ (LSM) cathodes in contact with yttria-stabilized zirconia (YSZ) electrolyte: (i) nanocrystalline LSM films deposited on as-prepared YSZ surface; (ii) the addition of poly(methyl methacrylate) microspheres as pore formers to further increase the porosity of the film c...

the present research aims to synthesize the ha/ysz composite and to formulate ha/ysz-gic for improving the fluoride release of the set cement. experiments were performed by mixture design (md) method, and data analysis was carried out by mini- tab 14 software. the results showed that the combination of 25.891wt.% ha, 70.246wt.% zro2 and 3.86wt.% y2o3 has desirable fluoride release profile. comb...